(19)
(11) EP 0 445 840 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.09.1991 Bulletin 1991/38

(43) Date of publication A2:
11.09.1991 Bulletin 1991/37

(21) Application number: 91104055.8

(22) Date of filing: 20.02.1986
(51) International Patent Classification (IPC)5D01F 6/66
(84) Designated Contracting States:
BE CH DE FR GB IT LI NL SE

(30) Priority: 22.02.1985 JP 32740/85
05.04.1985 JP 71209/85
17.04.1985 JP 80404/85
23.04.1985 JP 85437/85

(62) Application number of the earlier application in accordance with Art. 76 EPC:
86102215.0 / 0192262

(71) Applicant: IDEMITSU KOSAN COMPANY LIMITED
Tokyo 100 (JP)

(72) Inventors:
  • Shigeru, Matsuo
    Kimitsu-gun, Chiba-ken (JP)
  • Murakami, Tomoyoshi
    Kimitsu-gun, Chiba-ken (JP)

(74) Representative: Kraus, Walter, Dr. et al
Patentanwälte Kraus, Weisert & Partner Thomas-Wimmer-Ring 15
D-80539 München
D-80539 München (DE)


(56) References cited: : 
   
     
    Remarks:
    This application was filed on 15 - 03 - 1991 as a divisional application to the application mentioned under INID code 60.
     


    (54) Polycyanoaryl ether fibers


    (57) Polycyanoaryl ether fibers prepared from polycyanoaryl ethers containing specific repeating units and number average molecular weights or reduced viscosities by stretching melt-spinned fibers, said fibers having superior heat resistance and mechanical strength.





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